Table 6.3 Abundances of dominant infauna (species comprising >
3% total individuals) and total infaunal abundances at NAV.
Abundances are mean number per grab (n=5).
|
Winter Sampling |
||||
|
Jan 1996 |
Dec 1996 |
Jan 1997 |
Feb 1997 |
Jan 1998 |
|
Oligochaeta – 23 |
Oligochaeta – 120.4 |
Oligochaeta – 202.5 |
Oligochaeta – 35.0 |
Maranzellaria viridis – 143.3 |
|
Tanypodinae – 4.6 |
Procladius sp. – 13.1 |
Maranzellaria viridis – 9.1 |
Procladius sp. – 10.0 |
Oligochaeta – 23.1 |
|
Spionidae sp. – 4.4 |
Polypedilum sp. – 7.0 |
Procladius sp. – 7.7 |
Polypedilum sp. – 6.0 |
Total Infauna – 176.2 |
|
Chironomidae – 1.4 |
Total Infauna – 175 |
Total Infauna – 233.8 |
Ostracoda – 3.7 |
|
|
Diamesinea – 1.4 |
Total Infauna – 56.3 |
|||
|
Total Infauna – 36.8 |
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|
Spring Sampling |
Summer Sampling |
|||
|
Mar 1996 |
Apr 1997 |
Aug 1996 |
Sep 1997 |
Aug 1998 |
|
Oligochaeta – 56.8 |
Oligochaeta – 113.7 |
Oligochaeta – 39.8 |
Oligochaeta – 67.2 |
Oligochaeta – 8.2 |
|
Maranzellaria viridis – 28.6 |
Gastropoda – 23.8 |
Procladius sp. – 1.6 |
Total Infauna – 69.2 |
Mediomastus spp. – 0.8 |
|
Procladius sp. – 8.4 |
Coelotanypus sp. – 6.4 |
Polypedilum sp. – 1.4 |
Mediomastus ambiseta – 0.4 |
|
|
Polypedilum sp. – 7.4 |
Gammarus sp. – 6.2 |
Total Infauna – 43.2 |
Total Infauna – 10.0 |
|
|
Total Infauna – 112.6 |
Total Infauna – 164.0 |
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|
Summer (cont.) |
Fall Sampling |
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|
Sep 1998 |
Oct 1996 |
Oct 1998 |
||
|
Oligochaeta – 2.2 |
Oligochaeta – 44.0 |
Oligochaeta – 12.8 |
||
|
Procladius sp. – 0.8 |
Procladius sp. – 8.0 |
Total Infauna – 13.6 |
||
|
Bezzia palpomyia – 0.2 |
Tanypodinae sp. – 2.6 |
|||
|
Total Infauna – 3.2 |
Polypedilum sp. – 2.0 |
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|
Total Infauna – 61 |